DisplayManagerService启动及主屏添加-Android13

1、DisplayDeviceInfo屏幕信息

DisplayManagerService启动及主屏添加-Android13 中监听获取，在LocalDisplayAdapter.java#tryConnectDisplayLocked 获取 DisplayDevice 信息，在DisplayDeviceRepository.java#handleDisplayDeviceAdded 获取 DisplayDeviceInfo （ 即 DisplayDevice.getDisplayDeviceInfoLocked()）

命令查看屏幕信息：

$ dumpsys SurfaceFlinger --display-id
# Example output.
Display 21691504607621632 (HWC display 0): port=0 pnpId=SHP displayName="LQ123P1JX32"
Display 9834494747159041 (HWC display 2): port=1 pnpId=HWP displayName="HP Z24i"
Display 1886279400700944 (HWC display 1): port=2 pnpId=AUS displayName="ASUS MB16AP"

• mInfo.width = mActiveSfDisplayMode.width：屏幕宽
• mInfo.height = mActiveSfDisplayMode.height：屏幕高
• mInfo.densityDpi = getLogicalDensity()：屏幕Density
• mInfo.xDpi = mActiveSfDisplayMode.xDpi：显示器在X方向上的DPI物理密度
• mInfo.yDpi = mActiveSfDisplayMode.yDpi：显示器在Y方向上的DPI物理密度。
• mInfo.installOrientation = mStaticDisplayInfo.installOrientation：显示面板的安装方向相对于其自然方向。
• mInfo.type = Display.TYPE_INTERNAL 或 Display.TYPE_EXTERNAL ：内置屏幕<string name="display_manager_built_in_display_name">Built-in Screen</string>、HDMI 屏幕<string name="display_manager_hdmi_display_name">HDMI Screen</string>
• public int rotation = Surface.ROTATION_0：显示旋转方向

public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
    if (mInfo == null) {
        mInfo = new DisplayDeviceInfo();
        mInfo.width = mActiveSfDisplayMode.width;
        mInfo.height = mActiveSfDisplayMode.height;
        mInfo.modeId = mActiveModeId;
        mInfo.defaultModeId = getPreferredModeId();
        mInfo.supportedModes = getDisplayModes(mSupportedModes);
        mInfo.colorMode = mActiveColorMode;
        mInfo.allmSupported = mAllmSupported;
        mInfo.gameContentTypeSupported = mGameContentTypeSupported;
        mInfo.supportedColorModes =
                new int[mSupportedColorModes.size()];
        for (int i = 0; i < mSupportedColorModes.size(); i++) {
            mInfo.supportedColorModes[i] = mSupportedColorModes.get(i);
        }
        mInfo.hdrCapabilities = mHdrCapabilities;
        mInfo.appVsyncOffsetNanos = mActiveSfDisplayMode.appVsyncOffsetNanos;
        mInfo.presentationDeadlineNanos = mActiveSfDisplayMode.presentationDeadlineNanos;
        mInfo.state = mState;
        mInfo.uniqueId = getUniqueId();
        final DisplayAddress.Physical physicalAddress =
                DisplayAddress.fromPhysicalDisplayId(mPhysicalDisplayId);
        mInfo.address = physicalAddress;
        mInfo.densityDpi = getLogicalDensity();
        mInfo.xDpi = mActiveSfDisplayMode.xDpi;
        mInfo.yDpi = mActiveSfDisplayMode.yDpi;
        mInfo.deviceProductInfo = mStaticDisplayInfo.deviceProductInfo;

        // Assume that all built-in displays that have secure output (eg. HDCP) also
        // support compositing from gralloc protected buffers.
        if (mStaticDisplayInfo.secure) {
            mInfo.flags = DisplayDeviceInfo.FLAG_SECURE
                    | DisplayDeviceInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS;
        }

        final Resources res = getOverlayContext().getResources();

        mInfo.flags |= DisplayDeviceInfo.FLAG_ALLOWED_TO_BE_DEFAULT_DISPLAY;

        if (mIsFirstDisplay) {
            if (res.getBoolean(com.android.internal.R.bool.config_mainBuiltInDisplayIsRound)
                    || (Build.IS_EMULATOR
                    && SystemProperties.getBoolean(PROPERTY_EMULATOR_CIRCULAR, false))) {
                mInfo.flags |= DisplayDeviceInfo.FLAG_ROUND;
            }
        } else {
            if (!res.getBoolean(
                        com.android.internal.R.bool.config_localDisplaysMirrorContent)) {
                mInfo.flags |= DisplayDeviceInfo.FLAG_OWN_CONTENT_ONLY;
            }

            if (isDisplayPrivate(physicalAddress)) {
                mInfo.flags |= DisplayDeviceInfo.FLAG_PRIVATE;
            }
        }

        if (DisplayCutout.getMaskBuiltInDisplayCutout(res, mInfo.uniqueId)) {
            mInfo.flags |= DisplayDeviceInfo.FLAG_MASK_DISPLAY_CUTOUT;
        }

        final Display.Mode maxDisplayMode =
                DisplayUtils.getMaximumResolutionDisplayMode(mInfo.supportedModes);
        final int maxWidth =
                maxDisplayMode == null ? mInfo.width : maxDisplayMode.getPhysicalWidth();
        final int maxHeight =
                maxDisplayMode == null ? mInfo.height : maxDisplayMode.getPhysicalHeight();
        mInfo.displayCutout = DisplayCutout.fromResourcesRectApproximation(res,
                mInfo.uniqueId, maxWidth, maxHeight, mInfo.width, mInfo.height);

        mInfo.roundedCorners = RoundedCorners.fromResources(
                res, mInfo.uniqueId, maxWidth, maxHeight, mInfo.width, mInfo.height);
        mInfo.installOrientation = mStaticDisplayInfo.installOrientation;

        if (mStaticDisplayInfo.isInternal) {
            mInfo.type = Display.TYPE_INTERNAL;
            mInfo.touch = DisplayDeviceInfo.TOUCH_INTERNAL;
            mInfo.flags |= DisplayDeviceInfo.FLAG_ROTATES_WITH_CONTENT;
            mInfo.name = res.getString(
                    com.android.internal.R.string.display_manager_built_in_display_name);
        } else {
            mInfo.type = Display.TYPE_EXTERNAL;
            mInfo.touch = DisplayDeviceInfo.TOUCH_EXTERNAL;
            mInfo.flags |= DisplayDeviceInfo.FLAG_PRESENTATION;
            mInfo.name = getContext().getResources().getString(
                    com.android.internal.R.string.display_manager_hdmi_display_name);
        }
        mInfo.frameRateOverrides = mFrameRateOverrides;

        // The display is trusted since it is created by system.
        mInfo.flags |= DisplayDeviceInfo.FLAG_TRUSTED;
        mInfo.brightnessMinimum = PowerManager.BRIGHTNESS_MIN;
        mInfo.brightnessMaximum = PowerManager.BRIGHTNESS_MAX;
        mInfo.brightnessDefault = getDisplayDeviceConfig().getBrightnessDefault();
    }
    return mInfo;
}

2、LogicalDisplay.java

frameworks/base/services/core/java/com/android/server/wm/RootWindowContainer.java
frameworks/base/services/core/java/com/android/server/wm/DisplayContent.java
frameworks/base/services/core/java/com/android/server/display/LogicalDisplay.java

RootWindowContainer.java#onDisplayAdded

DisplayContent.java#updateDisplayAndOrientation

DisplayManagerService.java#setDisplayInfoOverrideFromWindowManager

LogicalDisplay.java#setDisplayInfoOverrideFromWindowManagerLocked

2.1 configureDisplayLocked刷新

RootWindowContainer.java#applySurfaceChangesTransaction

DisplayManagerService.java#performTraversalLocked

DisplayManagerService.java#configureDisplayLocked

LogicalDisplay.java#configureDisplayLocked